{
  "manageEntity": {
    "action": "Save",
    "entityId": "472972807",
    "entityType": "Track",
    "nonce": "0x58ecced1681dfc8230b7810098043bfbc578008f98aabb575c091faa93ddb2b9",
    "signature": "0x388a2bc64a8ea691c024bb93957dec9353ea72aa1ce82822eb903f42ab3d30650534d8fd50a796ae03a0df20c8642b1d8b473a70b8431cb600adbc5cf4a9a4dd1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}